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Subject[tip: perf/urgent] tools headers UAPI: Sync sched.h with the kernel
The following commit has been merged into the perf/urgent branch of tip:

Commit-ID: d6d829d92c6e82b2627d3bb0058403ff15ee0592
Gitweb: https://git.kernel.org/tip/d6d829d92c6e82b2627d3bb0058403ff15ee0592
Author: Arnaldo Carvalho de Melo <acme@redhat.com>
AuthorDate: Tue, 11 Feb 2020 16:03:47 -03:00
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitterDate: Tue, 11 Feb 2020 16:41:50 -03:00

tools headers UAPI: Sync sched.h with the kernel

To get the changes in:

769071ac9f20 ("ns: Introduce Time Namespace")

Silencing this tools/perf build warning:

Warning: Kernel ABI header at 'tools/include/uapi/linux/sched.h' differs from latest version at 'include/uapi/linux/sched.h'
diff -u tools/include/uapi/linux/sched.h include/uapi/linux/sched.h

Which enables 'perf trace' to decode the CLONE_NEWTIME bit in the
'flags' argument to the clone syscalls.

Example of clone flags being decoded:

[root@quaco ~]# perf trace -e clone*
0.000 qemu-system-x8/23923 clone(clone_flags: VM|FS|FILES|SIGHAND|THREAD|SYSVSEM|SETTLS|PARENT_SETTID|CHILD_CLEARTID, newsp: 0x7f0dad7f9870, parent_tidptr: 0x7f0dad7fa9d0, child_tidptr: 0x7f0dad7fa9d0, tls: 0x7f0dad7fa700) = 6806 (qemu-system-x86)
? qemu-system-x8/6806 ... [continued]: clone()) = 0
^C[root@quaco ~]#

At some point this should enable things like:

# perf trace -e 'clone*/clone_flags&NEWTIME/'

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andrei Vagin <avagin@openvz.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/include/uapi/linux/sched.h | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/tools/include/uapi/linux/sched.h b/tools/include/uapi/linux/sched.h
index 4a02178..2e3bc22 100644
--- a/tools/include/uapi/linux/sched.h
+++ b/tools/include/uapi/linux/sched.h
@@ -36,6 +36,12 @@
/* Flags for the clone3() syscall. */
#define CLONE_CLEAR_SIGHAND 0x100000000ULL /* Clear any signal handler and reset to SIG_DFL. */

+/*
+ * cloning flags intersect with CSIGNAL so can be used with unshare and clone3
+ * syscalls only:
+ */
+#define CLONE_NEWTIME 0x00000080 /* New time namespace */
+
#ifndef __ASSEMBLY__
/**
* struct clone_args - arguments for the clone3 syscall
\
 
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